diff --git a/src/common-crypto/CryptoBackend.ts b/src/common-crypto/CryptoBackend.ts
index bbd6e5ec682..76fb57aa624 100644
--- a/src/common-crypto/CryptoBackend.ts
+++ b/src/common-crypto/CryptoBackend.ts
@@ -78,6 +78,7 @@ export interface CryptoBackend extends SyncCryptoCallbacks, CryptoApi {
      * Get information about the encryption of an event
      *
      * @param event - event to be checked
+     * @deprecated Use {@link CryptoApi#getEncryptionInfoForEvent} instead
      */
     getEventEncryptionInfo(event: MatrixEvent): IEncryptedEventInfo;
 
diff --git a/src/rust-crypto/backup.ts b/src/rust-crypto/backup.ts
index 1b25c313189..69e37d48444 100644
--- a/src/rust-crypto/backup.ts
+++ b/src/rust-crypto/backup.ts
@@ -30,7 +30,6 @@ import {
 } from "../crypto-api/keybackup.ts";
 import { logger } from "../logger.ts";
 import { ClientPrefix, IHttpOpts, MatrixError, MatrixHttpApi, Method } from "../http-api/index.ts";
-import { IMegolmSessionData } from "../crypto/index.ts";
 import { TypedEventEmitter } from "../models/typed-event-emitter.ts";
 import { encodeUri, logDuration } from "../utils.ts";
 import { OutgoingRequestProcessor } from "./OutgoingRequestProcessor.ts";
@@ -38,6 +37,7 @@ import { sleep } from "../utils.ts";
 import { BackupDecryptor } from "../common-crypto/CryptoBackend.ts";
 import { ImportRoomKeyProgressData, ImportRoomKeysOpts, CryptoEvent } from "../crypto-api/index.ts";
 import { AESEncryptedSecretStoragePayload } from "../@types/AESEncryptedSecretStoragePayload.ts";
+import { IMegolmSessionData } from "../@types/crypto.ts";
 
 /** Authentification of the backup info, depends on algorithm */
 type AuthData = KeyBackupInfo["auth_data"];
diff --git a/src/rust-crypto/libolm_migration.ts b/src/rust-crypto/libolm_migration.ts
index 4a9784485b1..f23f9d7df41 100644
--- a/src/rust-crypto/libolm_migration.ts
+++ b/src/rust-crypto/libolm_migration.ts
@@ -21,7 +21,6 @@ import { CryptoStore, MigrationState, SecretStorePrivateKeys } from "../crypto/s
 import { IndexedDBCryptoStore } from "../crypto/store/indexeddb-crypto-store.ts";
 import { IHttpOpts, MatrixHttpApi } from "../http-api/index.ts";
 import { requestKeyBackupVersion } from "./backup.ts";
-import { IRoomEncryption } from "../crypto/RoomList.ts";
 import { CrossSigningKeyInfo, Curve25519AuthData } from "../crypto-api/index.ts";
 import { RustCrypto } from "./rust-crypto.ts";
 import { KeyBackupInfo } from "../crypto-api/keybackup.ts";
@@ -30,6 +29,12 @@ import { encodeBase64 } from "../base64.ts";
 import decryptAESSecretStorageItem from "../utils/decryptAESSecretStorageItem.ts";
 import { AESEncryptedSecretStoragePayload } from "../@types/AESEncryptedSecretStoragePayload.ts";
 
+interface LegacyRoomEncryption {
+    algorithm: string;
+    rotation_period_ms?: number;
+    rotation_period_msgs?: number;
+}
+
 /**
  * Determine if any data needs migrating from the legacy store, and do so.
  *
@@ -375,7 +380,7 @@ export async function migrateRoomSettingsFromLegacyCrypto({
         return;
     }
 
-    let rooms: Record<string, IRoomEncryption> = {};
+    let rooms: Record<string, LegacyRoomEncryption> = {};
 
     await legacyStore.doTxn("readwrite", [IndexedDBCryptoStore.STORE_ROOMS], (txn) => {
         legacyStore.getEndToEndRooms(txn, (result) => {
diff --git a/src/testing.ts b/src/testing.ts
index ba609ad0984..eab7e019de3 100644
--- a/src/testing.ts
+++ b/src/testing.ts
@@ -25,9 +25,8 @@ limitations under the License.
 import { IContent, IEvent, IUnsigned, MatrixEvent } from "./models/event.ts";
 import { RoomMember } from "./models/room-member.ts";
 import { EventType } from "./@types/event.ts";
-import { DecryptionError } from "./crypto/algorithms/index.ts";
 import { DecryptionFailureCode } from "./crypto-api/index.ts";
-import { EventDecryptionResult } from "./common-crypto/CryptoBackend.ts";
+import { DecryptionError, EventDecryptionResult } from "./common-crypto/CryptoBackend.ts";
 
 /**
  * Create a {@link MatrixEvent}.